The objective of the present work is to provide a detailed review of expressive speech synthesis (ESS). Among various approaches for ESS, the present paper focuses the development of ESS systems by explicit control. In this approach, the ESS is achieved by modifying the parameters of the neutral speech which is synthesized from the text. The present paper reviews the works addressing various issues related to the development of ESS systems by explicit control. The review provided in this paper include, review of the various approaches for text to speech synthesis, various studies on the analysis and estimation of expressive parameters and various studies on methods to incorporate expressive parameters. Finally the review is concluded by mentioning the scope of future work for ESS by explicit control.
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D. Pravena and Dr. Govind D., “Expressive Speech Synthesis: A Review”, International Journal of Speech Technology, vol. 16, pp. 237–260, 2013.